Among the valves on the DEEP DRILLER to open when using the Salt-Water Service Pump to pump water into tank 10S is __________.

Correct Answer: Option B — 47

Valve 47 on the DEEP DRILLER piping schematic specifically aligns the Salt-Water Service Pump discharge to starboard tank 10S, satisfying operational requirements for filling specific lower-hull ballast tanks per the vessel's standard operating procedures.